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Those are Hakko Omnivise PCB Holders. I have one and it's a joy to use. Super heavy and stable.

Google Image search?

Btw, for through hole soldering and rework, Idea-Tek PCSA is on a completely different level of efficiency.

Ideal-Tek, not Idea-Tek.

Correct. Iphone autocorrected incorrectly, but you know what I meant.

Yup, it's the Hakko Omnivise. They might seem a little pricey, but they are worth every penny.